Siemens SIRIUS 3UG4513-1BR20 Phase Failure &
Undervoltage Monitoring Relay
The Siemens 3UG4513-1BR20 is a high-performance analog
monitoring relay designed for reliable monitoring of three-phase power systems.
It protects motors, compressors, pumps, cranes, HVAC systems, and industrial
machinery against phase failure, incorrect phase sequence, undervoltage, and
voltage asymmetry. The relay continuously monitors the supply voltage and
disconnects the control circuit during abnormal conditions, helping prevent
equipment damage and costly downtime.
This compact DIN rail mounted monitoring relay features
adjustable undervoltage settings, fixed 20% asymmetry monitoring, adjustable
delay time from 0 to 20 seconds, and dual changeover contacts for dependable
switching operations. Its rugged industrial design with IP20 protection ensures
stable performance in demanding automation environments.
Key Features
|
Parameter |
Specification |
|
Product Model |
3UG4513-1BR20 |
|
Product Series |
SIRIUS 3UG4 |
|
Product Type |
Phase Monitoring Relay |
|
Monitoring Functions |
Phase Failure, Phase Sequence,
Undervoltage, Asymmetry |
|
Rated Voltage |
3 x 160–690 V AC |
|
Frequency Range |
50–60 Hz |
|
Asymmetry Threshold |
20% Fixed |
|
Hysteresis |
5% Fixed |
|
Time Delay |
Adjustable 0–20 s |
|
Output Contacts |
2 Changeover Contacts (DPDT) |
|
Mounting Type |
DIN Rail Mounting |
|
Connection Type |
Screw Terminal |
|
Protection Class |
IP20 |
|
Operating Temperature |
-20°C to +65°C |
|
Switching Capacity |
250 V AC / 3 A |
|
Mechanical Life |
10 Million Operations |
|
Electrical Life |
100,000 Operations |
|
Dimensions |
22.5 × 110 × 91 mm |
|
Voltage Type |
AC Monitoring |
|
LED Indication |
Yes |
|
Standards |
IEC 60664 |
|
Successor Model |
3UG5514-1BR20 |
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